Global Patent Index - EP 0903623 A1

EP 0903623 A1 19990324 - Binders for thermographic materials

Title (en)

Binders for thermographic materials

Title (de)

Bindemittel für thermographische Materialien

Title (fr)

Liants pour des produits thermographiques

Publication

EP 0903623 A1 19990324 (EN)

Application

EP 98202543 A 19980729

Priority

  • EP 98202543 A 19980729
  • EP 97202873 A 19970917

Abstract (en)

A substantially light-insensitive black and white thermographic material comprising a support and a thermosensitive element containing a substantially light-insensitive organic silver salt, a reducing agent therefor in thermal working relationship therewith and a binder, characterized in that the binder is a water-dispersible film-forming polymer having covalently bonded ionic groups and the thermographic material is thermally developable under substantially water-free conditions; and a process for producing the substantially light-insensitive black and white thermographic material comprising the steps of: producing an aqueous dispersion of the substantially light-insensitive organic silver salt; producing one or more aqueous coating compositions containing together the aqueous dispersion of the substantially light-insensitive organic silver salt, the reducing agent and the binder; and applying the one or more aqueous coating compositions to the support, thereby forming after drying the thermosensitive element.

IPC 1-7

G03C 1/498

IPC 8 full level

B41M 5/323 (2006.01); B41M 5/26 (2006.01); B41M 5/30 (2006.01); B41M 5/337 (2006.01); G03C 1/498 (2006.01)

CPC (source: EP)

G03C 1/4989 (2013.01)

Citation (search report)

Designated contracting state (EPC)

BE DE FR GB

DOCDB simple family (publication)

EP 0903623 A1 19990324; EP 0903623 B1 20030514; DE 69814544 D1 20030618; DE 69814544 T2 20040318; JP H11170709 A 19990629

DOCDB simple family (application)

EP 98202543 A 19980729; DE 69814544 T 19980729; JP 28048298 A 19980917